To avoid confusion, set aside groups of disks for recording classified data at
each security level. Mark each disk or diskette with a stick-on label with the
overall security classification and a permanently assigned identification
number. When you declassify and degauss the disks, remove all external
labels indicating the classification unless you immediately use the disk to
store information of the same classification level.
When you use the computer to create classified graphics and text, make sure
to mark the computer monitor at the top above the screen with the
appropriate security classification.
Mark hard copy reports or printouts from a printer, terminal, plotter, or
other computer equipment at the top-and-bottom-center of each page with the
appropriate classification or the word unclassified. Number each page
consecutively. In most cases, do so as you compose the artwork or text in
the computer. If you are in doubt about security markings, consult
Magnetic media, such as disks, eventually wear out or become damaged. If
the disk contained classified material, degauss or erase it before destruction.
Handle and dispose of printer ribbon and carbon paper used to print/transfer
classified information according to the highest classification level of the data
printed by that ribbon or carbon. Follow the requirements outlined in the
In addition to safeguarding the information in a computer, protect the custody
of the system. Do not indiscriminately move the system in and out of work
spaces. If you must loan equipment, limit equipment loans and have
borrowers sign for custody of the loaned gear. Keep an inventory identifying
the equipment by make and model, the type of system the equipment is part
of, the mode the equipment operates in, what kind of information and media
the computer processes, and the level of sensitivity for the highest
classification of material processed. Post the name and phone number of the
physical security officer and/or ADPSO near the workstation.